<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input @keydown.enter="hAdd" v-model.trim="taskName" class="new-todo" placeholder="请输入任务名称" autofocus />
  </header>
</template>

<script>
export default {
  data() {
    return {
      taskName: "",
    };
  },
  methods:{
    hAdd(){
        if(this.taskName==='') return alert('请输入正确信息')
        this.$emit('hTaskname',this.taskName)
        this.taskName=''
    }
  }
};
</script>

<style>
</style>